SHAGDAR, E.-A.; BALT, B. Extending Nonstandard Finite Difference Scheme for the SEIR Epidemic Model. Journal of Institute of Mathematics and Digital Technology, [S. l.], v. 4, n. 1, p. 16–24, 2022. DOI: 10.5564/jimdt.v4i1.2657. Disponível em: https://mongoliajol.info/index.php/JIMDT/article/view/2657. Acesso em: 14 jun. 2024.